Apex domains cannot have CNAME records.
Question and response
Question
dig goskope.com. NS
Answer
goskope.com. 5 NS ns4.goskope.com.
goskope.com. 5 NS ns6.goskope.com.
goskope.com. 5 NS ns1.goskope.opskope.com.
goskope.com. 5 NS ns3.goskope.com.
goskope.com. 5 NS ns2.goskope.opskope.com.
goskope.com. 5 NS ns5.goskope.com.
Authority
The response has no authority records.
Additional
ns3.goskope.com. 5 A 163.116.160.24
ns4.goskope.com. 5 A 31.186.239.225
ns5.goskope.com. 5 A 8.36.116.203
ns6.goskope.com. 5 A 163.116.135.111
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0